JPS57202929A - Bender - Google Patents
BenderInfo
- Publication number
- JPS57202929A JPS57202929A JP8682881A JP8682881A JPS57202929A JP S57202929 A JPS57202929 A JP S57202929A JP 8682881 A JP8682881 A JP 8682881A JP 8682881 A JP8682881 A JP 8682881A JP S57202929 A JPS57202929 A JP S57202929A
- Authority
- JP
- Japan
- Prior art keywords
- work
- driving part
- upward
- apron
- ram
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
- B21D5/006—Bending sheet metal along straight lines, e.g. to form simple curves combined with measuring of bends
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/16—Control arrangements for fluid-driven presses
- B30B15/24—Control arrangements for fluid-driven presses controlling the movement of a plurality of actuating members to maintain parallel movement of the platen or press beam
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
PURPOSE:To bend a work with less angular difference between left and right parts of the work, by providing a mechanism, which keeps the upward movenent of a ram balanced, in the driving part of a bender. CONSTITUTION:The driving part of a press brake is provided with a lower apron, namely, a movable ram 9 which is moved freely vertically for an upper apron, cylinders 17 and 19 which move the movable ram 9 upward, and a balance controlling mechanism 21 which makes the pressing force balanced to keep the upward movement of the movable ram 9 parallel. A bending indicator which detects a bending angle directly from a work is provided in either of the upper apron and the lower apron 9 at least, and the feedback control for the driving part is performed by a detection signal from the indicator. Thus, the work is bent with less angular difference between left and right parts of the work at a desired angle in accordance with the thickness, the tensile strength, etc. of the work and the change of a mold.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8682881A JPS57202929A (en) | 1981-06-08 | 1981-06-08 | Bender |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8682881A JPS57202929A (en) | 1981-06-08 | 1981-06-08 | Bender |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57202929A true JPS57202929A (en) | 1982-12-13 |
Family
ID=13897668
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP8682881A Pending JPS57202929A (en) | 1981-06-08 | 1981-06-08 | Bender |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57202929A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0230326A (en) * | 1988-07-19 | 1990-01-31 | Yamazaki Mazak Corp | Press brake with work measuring means and measuring method for work thereof |
JP2001347320A (en) * | 2000-06-05 | 2001-12-18 | Amada Co Ltd | Method and apparatus for bending |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53120671A (en) * | 1977-03-31 | 1978-10-21 | Amada Co Ltd | Bending angle setting process at bending machine and device |
JPS542973A (en) * | 1977-06-09 | 1979-01-10 | Maru Kikai Kogyo | Parallellmoving device for ram of pressing machine |
-
1981
- 1981-06-08 JP JP8682881A patent/JPS57202929A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53120671A (en) * | 1977-03-31 | 1978-10-21 | Amada Co Ltd | Bending angle setting process at bending machine and device |
JPS542973A (en) * | 1977-06-09 | 1979-01-10 | Maru Kikai Kogyo | Parallellmoving device for ram of pressing machine |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0230326A (en) * | 1988-07-19 | 1990-01-31 | Yamazaki Mazak Corp | Press brake with work measuring means and measuring method for work thereof |
JPH0470091B2 (en) * | 1988-07-19 | 1992-11-10 | Yamazaki Mazak Corp | |
JP2001347320A (en) * | 2000-06-05 | 2001-12-18 | Amada Co Ltd | Method and apparatus for bending |
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